51486897 has 48 divisors (see below), whose sum is σ = 92290752. Its totient is φ = 25159680.

The previous prime is 51486893. The next prime is 51486899. The reversal of 51486897 is 79868415.

It is not a de Polignac number, because 51486897 - 2² = 51486893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51486893) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26553 + ... + 28425.

It is an arithmetic number, because the mean of its divisors is an integer number (1922724).

Almost surely, 2^51486897 is an apocalyptic number.

It is an amenable number.

51486897 is a deficient number, since it is larger than the sum of its proper divisors (40803855).

51486897 is a wasteful number, since it uses less digits than its factorization.

51486897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918 (or 1911 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 51486897 is about 7175.4370598591. The cubic root of 51486897 is about 372.0193870692.

The spelling of 51486897 in words is "fifty-one million, four hundred eighty-six thousand, eight hundred ninety-seven".